<template>
	<Header></Header>
	<div class='coursemain'>
		<div class="course-main">
			<section class="search-container">
		        <div class="search-item">
		          <div class="title-name">课程方向：</div>
		          <div class="all-items">
		            <el-tag
                        class="category-poniter"
		                effect="plain"
		                type="info"
		            >全部</el-tag>
		            <el-tag
                        v-for='item in firstCategorys'
		            	:key='item.id'
		                :class="currentId['fcategory'].id==item.id?'category-poniter':'category-poniter-item'"
		                effect="plain"
		                type="info"
                        @click='buildingCondition("fcategory",item.id)'
		            >  {{ item.categoryName }}
		            </el-tag>
		        </div>
		        </div>
		        <div class="search-item search-item-transition" style="top: 45px;">
		          <div class="title-name">课程分类：</div>
		          <div class="all-items">
		             <el-tag
		                class="category-poniter"
		                effect="plain"
		                type="info"
		            >全部</el-tag>
		            <el-tag
                        v-for='item in secondCategorys'
		            	:key='item.id'
		                :class="currentId['scategory'].id==item.id?'category-poniter':'category-poniter-item'"
		                effect="plain"
		                type="info"
                        @click='buildingCondition("scategory",item.id)'
		            >  {{ item.categoryName }}
		            </el-tag>
		          </div>
		        </div>
		        <div class="search-item" style="top: 90px;">
		          <div class="title-name">课程难度：</div>
		          <div class="all-items">
		            <el-tag
		                class="category-poniter"
		                effect="plain"
		                type="info"
		            >全部</el-tag>
		            <el-tag
                        v-for='item in courseLevel'
		            	:key='item.id'
		                :class="currentId['clevel'].id==item.code?'category-poniter':'category-poniter-item'"
		                effect="plain"
		                type="info"
                        @click='buildingCondition("clevel",item.code)'
		            >  {{item.text}}
		            </el-tag>
		          </div>
		        </div>
     		</section>
		</div>
		<div class='main-container'>
			<div class="container-top">
		        <ul class="all">
		          <li 
                    class="item"
                    @click="handleZonghe"
                    :style='priceSortBy=="1" ? "color:#2C80FF":""'
                  >综合</li>
		          <li class="item split">|</li>
		          <li 
                    class="item"
                    @click="handleNewCourse"
                    :style='priceSortBy=="2" ? "color:#2C80FF":""'
                  >最新课程</li>
		          <li class="item split">|</li>
		          <li 
                    class="item"
                    @click="mostbuy"
                    :style='priceSortBy=="3" ? "color:#2C80FF":""'
                  >最多购买 </li>
		          <li class="item split">|</li>
		          <li class="item-price" @click="handlePrice">
		            <span :style='priceSortBy=="4"|| priceSortBy=="5"? "color:#2C80FF":""'>价格</span>
		            <span class="arrow">
                        <el-icon :style='priceSortBy=="4" ? "color:#2C80FF":""'><caret-top /></el-icon>
                        <el-icon :style='priceSortBy=="5" ? "color:#2C80FF":""'><caret-bottom /></el-icon>
		            </span>
		          </li>
		        </ul>
		        <ul class="right">
		          <li class="right-item">
                    <el-radio-group v-model="radio" @change='changeRadio'>
                        <el-radio value="1">免费课程</el-radio>
                        <el-radio value="2">会员课程</el-radio>
                    </el-radio-group>
		          </li>
		        </ul>
		      </div>
		      <div class="container-body">
		        <div class="newCourseContent">
		          <ul class="courseUl">
		            <li class='courseItem'
                        v-for='item in courseList'
		            	:key='item.id'>
                        <router-link :to="{ path: '/course-info/' + item.id }">
                            <div class='courseInfo'>
                                <div class='courseBg'>
                                    <img src='https://oss.xuexiluxian.cn/xiaoluxian-vcr/ed4eca4ebbeb4b489de722925a34d086.jpg'>
                                </div>
							    <div class="courseName">{{ item.courseName }}</div>
	                            <div class="courseDegree">{{ courseTypeFn(item.courseLevel) }} · {{item.purchaseCounter + item.purchaseCnt}}人报名</div>
                                <div class="coursePriceZero" v-if="item.discountPrice == 0">
                                    <div class="pricefree">免费学习</div>
                                    <img src="../assets/img/free.png" alt="">
                                </div>
                                <div class="coursePrice" v-else-if="item.isMember == 1">
                                    <div class="courseMemberbg"><span class="courseMember">会员免费</span></div>
                                    <div class="price">¥ {{ item.discountPrice }}</div>
                                </div>
                                <div class="coursePricePri" v-else>
                                    <div class="pricePri">¥ {{ item.discountPrice }}</div>
                                </div>
						    </div>
                        </router-link>
					</li>
		          </ul>
		        </div>
                <div class="pages">
                    <el-pagination 
                        background layout="prev, pager, next" :total="total" 
                        @current-change="queryCourse"
                    />
		        </div>
		      </div>
		</div>
	</div>
	<Foot></Foot>
</template>


<script setup>
import { CaretTop , CaretBottom } from "@element-plus/icons-vue";
//mixin
import mixin from '../mixins/courseType.js'
let { courseTypeFn } = mixin();
//组件
import Header from '../components/common/Header.vue'
import Foot from '../components/common/Foot.vue'
//api
import { getFirstCategorys , getSecondCategorys, searchCourse  } from '../utils/api/courseManage';

//获取一级分类的数据
let firstCategorys = ref([]);
//获取二级分类的数据
let secondCategorys  = ref([]);
let category = reactive({
    categoryId: -1
})

//请求二级分类
const getSecondCategorysFn = (category)=>{
    getSecondCategorys(category).then(res=>{
        secondCategorys.value = res.data.list;
    })
}

//课程难度的数据
let courseLevel = ref([
	{text: '初级',code: '1'}, 
  	{text: '中级',code: '2'},
 	{text: '高级',code: '3'}]
 );
 //所有课程的数据
let courseList = ref([]);
//查询课程的参数
let searchCourseParams = reactive({
	pageNum:1,
	pageSize:8,
    entity:{
        firstCategory:'',
        secondCategory:'',
        courseLevel:'',
        isFree:'',
        isMember:'',
        sortBy: ''
    }
});
//查询所有课程
const queryCourseList = ()=>{
	//查询所有课程
	searchCourse(searchCourseParams).then(res=>{
		courseList.value = res.data.pageInfo.list;
		total.value = res.data.pageInfo.total;
		console.log( res.data.pageInfo.list );
	})
}
//生命周期
onBeforeMount(()=>{
	//获取一级分类
	getFirstCategorys().then(res=>{
		firstCategorys.value = res.data.list;
	})
	//获取二级分类
	getSecondCategorysFn(category)
    //查询所有课程
    queryCourseList();
})

//分页的数据
let total = ref(0);
//点击分页
const queryCourse = ( val )=>{
	searchCourseParams.pageNum = val;
	queryCourseList(searchCourseParams);
}

let currentId = reactive({
  fcategory:{id:''},
  scategory:{id:''},
  clevel:{id:''}
})
//点击分类
const buildingCondition = ( type , id )=>{
    if (type === 'fcategory') {
        //免费课程和会员课程 之前数据清空
        searchCourseParams.entity.isMember = '';
        searchCourseParams.entity.isFree = '';
        radio.value = 0;
        //切换class
        currentId['scategory'].id = '';
        currentId['clevel'].id = '';
        currentId[type].id = id;
        //更新二级分类
        searchCourseParams.entity.courseLevel = '';
        searchCourseParams.entity.secondCategory = '';
        category.categoryId = id;
        getSecondCategorysFn(category);
        //更新课程数据
        searchCourseParams.entity.firstCategory = id;
        queryCourseList();
        return;
    }
    if( type === 'scategory' ){
        //免费课程和会员课程 之前数据清空
        searchCourseParams.entity.isMember = '';
        searchCourseParams.entity.isFree = '';
        radio.value = 0;
        //切换class
        currentId['clevel'].id = '';
        currentId[type].id = id;
        //更新课程数据
        searchCourseParams.entity.courseLevel = '';
        searchCourseParams.entity.secondCategory = id;
        queryCourseList();
        return;
    }
    if( type ==='clevel'){
        //切换class
        currentId[type].id = id;
        searchCourseParams.entity.courseLevel = id;
        //查询所有课程
        queryCourseList();
        return;
    }
}
// 免费课程 和 会员课程
const radio = ref()
const changeRadio = ( val )=>{
    if( val == '1' ){
        searchCourseParams.entity.isMember = '';
        searchCourseParams.entity.isFree = '1';
    }else if( val == '2' ){
        searchCourseParams.entity.isFree = '';
        searchCourseParams.entity.isMember = '1';
    }
  queryCourseList();
}

// 控制价格 升降序
let priceSortBy = ref('1');
//综合
const handleZonghe = ()=>{
    priceSortBy.value = '1' 
    searchCourseParams.entity.sortBy = '';
    queryCourseList();
}
//最新课程
const handleNewCourse = ()=>{
    priceSortBy.value = '2' 
    searchCourseParams.entity.sortBy = 'time-desc';
    queryCourseList();
}
//最多购买
const mostbuy = ()=>{
    priceSortBy.value = '3' 
    searchCourseParams.entity.sortBy = 'purchase-desc';
    queryCourseList();
}
//价格
const handlePrice = ()=>{
    if( priceSortBy.value == '4' ||  priceSortBy.value != '5' ){
        priceSortBy.value = '5'
        searchCourseParams.entity.sortBy = 'price-desc';
    }else if( priceSortBy.value == '5'){
        priceSortBy.value = '4'
        searchCourseParams.entity.sortBy = 'price-asc';
    }
    queryCourseList();
}
</script>


<style scoped>
.course-main {
  padding: 20px 0;
  width: 100%;
  height: 130px;
  background: #f3f5f9;
}
.search-container{
  width: 1200px;
  margin: 0 auto;
  position: relative;
  height: 100%;
}
.search-item{
  display: flex;
  overflow: hidden;
  cursor: pointer;
  position: absolute;
  height: 45px;
  transition: all 0.5s;
}
.search-item-transition:hover{
  z-index: 777;
  height: auto;
  box-shadow: rgb(95 101 105 / 10%) 0px 12px 20px 0px;
  border-radius: 8px;
  background: rgba(255,255,255);
}
.search-item .title-name {
  width: 100px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  line-height: 25px;
  text-align: justify;
  color: #333333;
  padding: 10px;
  opacity: 1;
}
.search-item .title-name:after {
  content: '.';
  width: 100%;
  display: inline-block;
  overflow: hidden;
  height: 0;
}

.search-item .all-items{
  width: calc(100% - 120px);
  min-height: 25px;
  display: flex;
  flex-wrap: wrap;
}
.title .all-list {
  width: 40px;
  height: 25px;
  line-height: 25px;
  border-radius: 4px;
  padding: 0 10px;
  align-items: center;
  text-align: center;
}

.title .all {
  opacity: 1;
  color: #2c80ff;
}

.title .item {
  height: 25px;
  line-height: 25px;
  margin: 0 15px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 21px;
  opacity: 1;
}

.title .item .active {
  color: #2c80ff;
}

.category-poniter {
  height: 25px;
  line-height: 25px;
  margin: 10px 5px;
  cursor: pointer;
  border: none;
  background: rgba(44, 128, 255, 0.1);
  color: #2c80ff;
}
.category-poniter-item {
  height: 25px;
  line-height: 25px;
  margin: 10px 5px;
  cursor: pointer;
  border: none;
  background: none;
  color: rgba(81, 87, 89, 1);
}

.main-container {
  width: 1200px;
  margin: 0 auto;
}

.container-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.all {
  display: flex;
  padding-top: 20px;
  font-size: 16px;
  color: #515759;
}

.all .item:first-child {
  margin-right: 20px;
}

.all .item {
  margin: 0 10px;
  cursor: pointer;
}

.right {
  display: flex;
  padding-top: 20px;
  font-size: 16px;
  color: #515759;
}

.right .right-item {
  margin-left: 10px;
}

.right .right-items {
  margin-right: 0px;
}

.arrow {
  position: relative;
}

.arrow i:first-child {
  position: absolute;
  top: -1px;
}

.arrow i:last-child {
  position: absolute;
  top: 7px;
}

.check {
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.up {
  position: absolute;
  top: 5px;
  left: 2px;
}

.down {
  position: absolute;
  top: 15px;
  left: 2px;
  transform: rotate(180deg);
  -ms-transform: rotate(180deg); /* IE 9 */
  -moz-transform: rotate(180deg); /* Firefox */
  -webkit-transform: rotate(180deg); /* Safari 和 Chrome */
  -o-transform: rotate(180deg); /* Opera */
}
.newCourseContent {
  width: 1200px;
  margin: 30px auto 0px auto;
}

.newCourseContent .courseUl {
  display: flex;
  flex-wrap: wrap;
}

.courseItem{
	width: 285px;
    height: 280px;
    margin: 0 20px 20px 0;
    transition: margin-top 0.2s;
}
.courseItem a {
    text-decoration: none;
}
.courseItem:hover{
    margin-top: -10px;
    cursor: pointer;
}
.courseItem:nth-child(4n+0){
    margin-right: 0 !important;
}
.courseInfo{
	position: relative;
    width: 100%;
    height: 270px;
    background: #ffffff;
    box-shadow: 1px 1px 10px rgb(27 39 94 / 40%);
    opacity: 1;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
    overflow: hidden;
    text-decoration: none;
}
.courseBg{
	position: relative;
    width: 100%;
    height: 160px;
}
.courseBg img{
	width: 100%;
    height: 100%;
}
.courseName{
    margin: 10px;
    font-weight: bold;
    font-size: 14px;
    color: #333333;
    display: -webkit-box;
    overflow: hidden;
}
.courseDegree{
    margin-left: 10px;
    font-size: 12px;
    color: #808080;
}
.coursePrice {
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 130px;
    font-size: 14px;
    margin-top: 15px;
    padding: 0 5px;
}
.coursePricePri{
    width: 75px;
    font-size: 14px;
    margin-top: 18px;
    padding: 0 13px;
    color: rgba(255, 114, 127, 1);
    font-weight: 700;
}
.coursePriceZero{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 75px;
    font-size: 14px;
    margin-top: 15px;
    padding: 0 10px;
    color: rgba(53, 134, 255, 1);
}
.courseMemberbg {
    position: relative;
    width: 80px;
    height: 20px;
    color: #ffffff;
    background: linear-gradient(90deg, #ff928e 0%, #fe7062 99%);
    border-radius: 24px 0px 24px 0px;
}
.courseMember {
    position: absolute;
    line-height: 20px;
    left: 13px;
    font-weight: 700;
}
.price {
    line-height: 25px;
    left: 100px;
    color: #ff727f;
    font-weight: 700;
}
.pages{
	display: flex;
	align-items: center;
	justify-content: center;
	padding:20px 0; 
}
</style>